Other items were removed from the suite, including bed sheets. ­Despite the coroner ruling out any foul play, officers in Beverly Hills ­Police Department confirmed their investigation is not closed.

If detectives find that someone did clear up the room after Whitney died they could be charged with tampering with police evidence.

Officers combed the suite at the Beverly Hilton Hotel after the discovery of her body on February 11 and found no trace of illegal drugs. But toxicology results released on Thursday confirmed ­Whitney snorted the drug shortly before she died.

A source close to the case said: “It looks like an individual removed all traces of cocaine before authorities arrived.”

Whitney’s on-off boyfriend Ray J, 31, has angrily denied claims by her former sister-in-law that he provided cocaine on the day she died.